Which one of these statements about digital signatures is true? A digital signature: a. Is used to add a personal touch to e-mail messages.
b. Automatically encrypts the contents of an e-mail.
c. Is a scanned image of your real signature.
d. Is used to verify the identity of the sender of a message.​

A. Is used to add a personal touch to e-mail messages.

Explanation:

A digital signature—a type of electronic signature—is a mathematical algorithm routinely used to validate the authenticity and integrity of a message (e.g., an email, a credit card transaction, or a digital document). ... Digital signatures are significantly more secure than other forms of electronic signatures.

The amount of current is measured in units calledamperes or amps. one ampere of current is equal to the chargeof 6,240,000,000,000,000,000 electrons flowing past a given pointin a circuit per second